Connecting structure of steel stand column and concrete bearing platform and construction method thereof

Abstract

The invention provides a connecting structure of a steel stand column and a concrete bearing platform, and belongs to the technical field of bridge engineering prefabrication and assembly. The connecting structure is characterized in that on the basis of high-strength prestressed anchor bolt connection at the bottom of the steel stand column, the built-in double-layer flange plate design is adopted, and in addition, each pre-buried assembly scattered inside the bearing platform is designed into an invariable whole mechanism; the double-layer flange plate design increases the force transmissionanchoring length, and reduces column bottom stress concentration; meanwhile, due to the built-in flange connection structure, the bearing platform structure is simplified, key connection components are isolated from the outside, the durability of the key connection components is improved, and reversible operation of stand column installation can be achieved according to needs; the integral pre-buried assembly can improve the burying precision and reduce the disturbance influence generated by bearing platform concrete construction. The connecting structure is simple, convenient in construction, readily ensures the quality of component connection, and has the good popularization value.

Description

technical field [0001] The invention relates to the technical field of bridge engineering prefabrication and assembly, in particular to a connection structure between a steel column and a concrete cap and a construction method thereof. Background technique [0002] As the main force-bearing component of the bridge structure, the column is responsible for transmitting the load of the upper structure to the lower foundation. The prefabricated bridge structure has the advantages of convenient construction, stable quality, little impact on the environment and traffic, good energy saving and environmental protection, and has become one of the main development trends of bridge structures in the world. [0003] The prefabricated assembly of columns is a relatively cutting-edge construction technology in recent years. It is mainly used for construction conditions where the site is limited and conventional formwork cannot be used. Instead, factory prefabrication is used and on-site h...

AI Technical Summary

Problems solved by technology

At present, the existing steel column bottom connection form mostly adopts an external single-layer flange structure, and at the same time, it is encapsulated with outsourcing concrete to meet the durability requirements of anchor bolts; at the same time, most of the pre-embedded components in the cap adopt decentralized Installation method, in the process of cap pouring and concrete vibration, it is difficult to ensure the installation accuracy requirements of each pre-embedded component

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